CN115684123A - Method for accurately obtaining components and pressure of methane-ethane mixed gas inclusion through Raman spectrum - Google Patents
Method for accurately obtaining components and pressure of methane-ethane mixed gas inclusion through Raman spectrum Download PDFInfo
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Abstract
The invention discloses a method for accurately obtaining components and pressure of a methane-ethane mixed gas inclusion through Raman spectroscopy, which belongs to the technical field of methods for measuring components and pressure of mixed gas inclusions, and aims to solve the problems that the existing method for determining ethane content in methane-rich gas is not established by an accurate in-situ test method because human eyes judge the uniformity of the inclusion and record temperature data, the error is large, rapid detection and quantification are not available, and the existing method for determining the ethane content in methane-rich gas comprises the following steps: establishing CH 4 ‑C 2 H 6 Artificially synthesizing an inclusion Raman quantitative model: tubing and sample loading, equipment connection, raman observation, gas washing and vacuumizing, and sample preparationCollecting product spectrum; the method comprises the steps of accurately calculating the ethane content in the natural methane-rich gas inclusion, combining a cold-hot table and a laser Raman spectrometer by modifying the cold-hot table and the laser Raman spectrometer, modifying conventional Raman qualitative analysis to realize Raman quantitative analysis of the fluid inclusion, and accurately measuring the density of the fluid inclusion at a very high temperature.
Description
Technical Field
The invention belongs to the technical field of methods for measuring components and pressures of mixed gas inclusions, and particularly relates to a method for accurately obtaining CH (CH) through Raman spectroscopy 4 -C 2 H 6 The technical field of methods for mixing gas inclusion components and pressure.
Background
The relative molar content of methane and ethane in hydrocarbon gas components of natural gas determines the drying coefficient of the natural gas, and is an important basis for judging the dry and wet type of the natural gas, which has important significance for the research of natural gas sources.
The traditional method for acquiring the component content of the gas inclusion comprises the following methods, namely CO 2 Volumetric method, salinity-temperature method and fluid inclusion PVT simulation method, CO 2 The tolerance method and the salinity-temperature method are limited by system application and are difficult to apply in the field of oil-gas exploration, the PVT simulation method is used for calculating the capture pressure of hydrocarbon inclusion of an immiscible system through phase change temperature and gas-liquid ratio parameters, the method is greatly influenced by gas-liquid ratio measurement errors, even though the confocal layer cutting technology greatly improves the gas-liquid ratio measurement accuracy, the method cannot be used for saline water or gas inclusion without Raman emission, compared with the laser Raman spectrum quantitative analysis technology, the inclusion analysis method has lower analysis and test efficiency and more independent observation parameter influences, the observation accuracy is lower, the accurate quantification of the composition and the density of the system is restricted, and the method has the defects that the method has the characteristics of larger error and no quick detection and quantification due to the fact that human eyes judge the uniformity of the inclusion and record temperature data, and the current method has the characteristics of quick detection and quantification in methane-rich gasThe determination of ethane content has not been established with accurate in situ testing methods.
Disclosure of Invention
The invention aims to: the method is used for solving the problems that the existing method for determining the content of ethane in methane-rich gas is not established by an accurate in-situ test method because human eyes judge the uniformity of an inclusion and record temperature data, the error is large, rapid detection and quantification are not available, and the existing method for determining the content of ethane in methane-rich gas is not established.
The technical scheme adopted by the invention is as follows:
a method for accurately acquiring the components and pressure of a methane-ethane mixed gas inclusion through Raman spectroscopy comprises the following steps:
(1) Establishing CH 4 -C 2 H 6 Artificially synthesizing an inclusion Raman quantitative model;
firstly, the method comprises the following steps: preparing a tube and loading a sample;
secondly, the method comprises the following steps: connecting equipment;
thirdly, the steps of: performing Raman observation;
fourthly: washing gas and vacuumizing;
fifth: collecting a sample spectrum;
(2) Accurate calculation of ethane content in natural methane-rich gas inclusions.
In the technical scheme of the application, the cold-hot table and the laser Raman spectrometer are combined by modifying the cold-hot table and the laser Raman spectrometer, the conventional Raman qualitative analysis is modified to realize the Raman quantitative analysis of the fluid inclusion, the density of the fluid inclusion is accurately measured at the abnormal temperature, and the method firstly analyzes CH under different composition conditions 4 And C 2 H 6 Measuring main Raman characteristic parameter information such as Raman shift, peak area and peak height under different systems under the influence of temperature or pressure change of the mixed gas; summarizing the quantitative relation between the Raman peak height ratio and the content ratio of the mixed gas; then, the calibration preposed result is utilized and the Raman peak displacement data is utilized to complete the calibration work of the quantitative relation among the mixed gas density, the peak displacement and the content ratio, and finally, the calibration is realizedThe result is applied to the determination of the internal density of the natural gas mixture fluid inclusion and the condition of each component.
Further, the tubing sample preparation and sample loading method comprises the following steps: cutting appropriate length of capillary tube, connecting with steel tube with glue, and mixing with known composition CH 4 -C 2 H 6 The mixed gas is filled into a capillary tube by a syringe, and is sealed by mercury, and then a steel tube connected with the capillary tube is connected with a valve.
Further, the device connection comprises the following steps: the method comprises the steps of placing a cold and hot table under an objective lens of a transmission microscope, placing a capillary tube into the cold and hot table, adjusting the objective lens to be 10 x, adjusting the height of a Raman microscope to be a proper height, fixing a capillary tube connecting valve on an XYZ three-axis moving platform, adjusting the distance and the height, focusing mixed gas on the inner wall of the capillary tube, connecting a pressure gauge and a pressure pump, adjusting the pressure to be required, keeping the pressure gauge stable for a period of time, closing the valve on one side of the pressure pump, taking down the pressure pump, and displaying the pressure of a sample in real time by a pressure indicator so that the sample can be subjected to Raman observation next.
Further, the raman observation comprises the steps of: opening software of Raman spectrum, focusing a focus to a gas phase part, opening a cold and hot table and the software thereof, raising the temperature to a specified temperature, keeping the temperature constant, carrying out Raman observation on the mixed gas under a 10 multiplied objective lens, recording Raman and corresponding spectrum of the mixed gas at fixed time intervals, wherein a capillary quartz tube adopted by the experiment has the outer diameter of about 800 micrometers and the inner diameter of about 100 micrometers, and the capillary quartz tube has the advantages of high pressure resistance and is shown in figure 1 as a detailed connection schematic diagram of the experimental device.
Further, the gas washing and vacuum pumping comprises the following steps: firstly, closing all valves, opening valves V2, V3, V4, V5, V6, V7 and V8, opening a vacuum pump and vacuumizing to discharge air and water in a pipeline, then closing the V3 valve, stopping the vacuum pump, repeating the step for 3-4 times, opening valves V2 and V4, opening a gas cylinder valve, slowly opening the V5 valve, controlling the pressure at 120psi, recording the reading of a pressure gauge, closing the V5 valve, opening the vacuum pump, vacuumizing, and repeating the step for 3-4 times.
Further, the sample spectrum acquisition comprises the following steps: closing valves V1, V2 and V3, selecting a 20x objective lens for observation, opening a Video window, setting a grating to be 1800cm-1, setting the center of the grating to be 2900cm-1, setting the single acquisition time to be 20 seconds, accumulating 10 times of Raman spectra, observing whether methane-ethane mixed gas is injected successfully, if air and other substances are not mixed successfully, repeatedly vacuumizing to ensure that a sample is filled in a quartz capillary tube, closing the valves V1, V2, V3 and V5, inserting the capillary tube into a modified cold and hot platform silver crucible, fixing the capillary tube, covering a cold and hot platform heat-insulating cover, controlling the temperature of the experiment, connecting a pressure pump, pressurizing through pure water, synthesizing artificially synthesized inclusion bodies with different contents of ethane, repeating the steps, obtaining corresponding Raman peak height and peak displacement ratios of methane and ethane under different content ratios, and listing the density, the peak height ratio and the frequency shift difference of methane and ethane mixed gas with different ratios obtained at room temperature, wherein the Raman difference is obtained by subtracting the peak position of pure methane measured at 20 ℃ from the position of the Raman difference obtained through the experiment.
Further, the method for accurately calculating the ethane content in the natural methane-rich gas inclusion is to collect different CH at room temperature 4 And C 2 H 6 The Raman spectrum of the content proportion is subjected to peak-splitting fitting by using software peakfit, and CH (channel) which changes along with temperature and pressure can be obtained from data 4 And C 2 H 6 The raman characteristic peak shift of the inclusion is regularly changed, and the mixed gas density and the relative content of methane and ethane in the inclusion are deduced based on the known temperature during measurement and the calculated HR after measurement.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the laser Raman spectrometer has the technical advantages of high resolution, in-situ, no damage and quantification in the research of the fluid inclusion, which is the premise of accurate quantification of the temperature-pressure-density of the inclusion.
2. The method firstly analyzes CH under different composition conditions 4 And C 2 H 6 Measuring main Raman characteristic parameter information such as Raman displacement, peak area, peak height and the like under different systems under the influence of temperature or pressure change of the mixed gas; summarizing the quantitative relation between the Raman peak height ratio and the content ratio of the mixed gas; and then, the calibration preposed result is utilized and the Raman peak displacement data is utilized to complete the calibration work of the quantitative relation among the mixed gas density, the peak displacement and the content ratio, and finally, the calibration result is applied to the measurement of the internal density and each component condition of the natural mixed gas fluid inclusion.
3. A series of Raman observation experiments are developed by utilizing a micro laser Raman spectroscopy technology, the influence of component content on Raman characteristic peaks of natural gas molecules under different temperature and pressure conditions is systematically measured, a Raman quantitative model of a related artificially synthesized inclusion is fitted, and a method for quantitatively acquiring components and pressure of a natural methane and ethane mixed gas inclusion is established.
Drawings
FIG. 1 is an artificial synthesis of CH 4 -C 2 H 6 A schematic diagram of a mixed gas laser Raman spectrum acquisition device;
FIG. 2 is a schematic view showing a phenomenon of a gas phase formed by a mixed gas of methane and ethane under a 20-fold mirror;
FIG. 3 is a schematic diagram of natural fluid inclusion composition and pressure acquisition;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Example 1
As shown in fig. 1 to 3, a method for accurately obtaining a methane-ethane mixed gas inclusion composition and pressure by raman spectroscopy, includes the steps of:
(1) Establishing CH 4 -C 2 H 6 Artificially synthesizing an inclusion Raman quantitative model;
firstly: preparing a tube and loading a sample;
secondly, the method comprises the following steps: connecting equipment;
thirdly, the steps of: performing Raman observation;
fourthly: washing gas and vacuumizing;
fifth: collecting a sample spectrum;
(2) Accurate calculation of ethane content in natural methane-rich gas inclusions.
In the technical scheme of the application, the cold-hot table and the laser Raman spectrometer are combined by modifying the cold-hot table and the laser Raman spectrometer, the conventional Raman qualitative analysis is modified to realize the Raman quantitative analysis of the fluid inclusion, the density of the fluid inclusion is accurately measured at the abnormal temperature, and the method firstly analyzes CH under different composition conditions 4 And C 2 H 6 Measuring main Raman characteristic parameter information such as Raman shift, peak area and peak height under different systems under the influence of temperature or pressure change of the mixed gas; summarizing the quantitative relation between the Raman peak height ratio and the content ratio of the mixed gas; and then, the calibration preposed result is utilized and the Raman peak displacement data is utilized to complete the calibration work of the quantitative relation among the mixed gas density, the peak displacement and the content ratio, and finally, the calibration result is applied to the measurement of the internal density and each component condition of the natural mixed gas fluid inclusion.
The tubular quartz transparent cavity, i.e. the main body part of the fused quartz high-pressure cavity, is a CH which can be used for mixing known components by an internal standard method 4 -C 2 H 6 The mixed gas is filled into a quartz fused capillary cavity, the Raman spectral parameter characteristic change of the mixed ethane and methane under different temperature and pressure is observed in a tubular transparent high-pressure capillary quartz tube, one end of the capillary quartz tube is sealed by oxyhydrogen flame welding, and the other end (the opening end) is connected with a pressurizing system (pure water pressurizing) through a high-pressure sealing ring and a valve. One closed end is placed on a Linkam cold and hot table for temperature control, a gas phase part is focused under a microscope, and Raman spectra under different temperature and pressure conditions are collected.
Example 2
As shown in fig. 1, on the basis of example 1, the tubing sample preparation comprises the following steps: cutting appropriate length of capillary tube, connecting with steel tube with glue, and mixing with known composition CH 4 -C 2 H 6 The mixed gas is filled into a capillary tube by a syringe, and is sealed by mercury, and then a steel tube connected with the capillary tube is connected with a valve.
The equipment connection comprises the following steps: the method comprises the steps of placing a cold and hot table under an objective lens of a transmission microscope, placing a capillary tube into the cold and hot table, adjusting the objective lens to be 10 x, adjusting the height of a Raman microscope to be a proper height, fixing a capillary tube connecting valve on an XYZ three-axis moving platform, adjusting the distance and the height, focusing mixed gas on the inner wall of the capillary tube, connecting a pressure gauge and a pressure pump, adjusting the pressure to be required, keeping the pressure gauge stable for a period of time, closing the valve on one side of the pressure pump, taking down the pressure pump, and displaying the pressure of a sample in real time by a pressure indicator so that the sample can be subjected to Raman observation next.
The Raman observation comprises the following steps: opening software of Raman spectrum, focusing a focus to a gas phase part, opening a cold and hot table and the software thereof, raising the temperature to a specified temperature, keeping the temperature constant, carrying out Raman observation on the mixed gas under a 10 multiplied objective lens, recording Raman and corresponding spectrum of the mixed gas at fixed time intervals, wherein a capillary quartz tube adopted by the experiment has the outer diameter of about 800 micrometers and the inner diameter of about 100 micrometers, and the capillary quartz tube has the advantages of high pressure resistance and is shown in figure 1 as a detailed connection schematic diagram of the experimental device.
The gas washing and vacuum pumping steps include the following steps: firstly, closing all valves, opening valves V2, V3, V4, V5, V6, V7 and V8, opening a vacuum pump and vacuumizing to discharge air and water in a pipeline, then closing the V3 valve, stopping the vacuum pump, repeating the step for 3-4 times, opening valves V2 and V4, opening a gas cylinder valve, slowly opening the V5 valve, controlling the pressure at 120psi, recording the reading of a pressure gauge, closing the V5 valve, opening the vacuum pump, vacuumizing, and repeating the step for 3-4 times.
The sample spectrum acquisition comprises the following steps: closing valves V1, V2 and V3, selecting a 20x objective lens for observation, opening a Video window, setting a grating to be 1800cm-1, setting the center of the grating to be 2900cm-1, setting the single acquisition time to be 20 seconds, accumulating 10 times of Raman spectra, observing whether methane-ethane mixed gas is injected successfully, if air and other substances are not mixed successfully, repeatedly vacuumizing to ensure that a sample is filled in a quartz capillary tube, closing the valves V1, V2, V3 and V5, inserting the capillary tube into a modified cold and hot platform silver crucible, fixing the capillary tube, covering a cold and hot platform heat-insulating cover, controlling the temperature of the experiment, connecting a pressure pump, pressurizing through pure water, synthesizing artificially synthesized inclusion bodies with different contents of ethane, repeating the steps, obtaining corresponding Raman peak height and peak displacement ratios of methane and ethane under different content ratios, and listing the density, the peak height ratio and the frequency shift difference of methane and ethane mixed gas with different ratios obtained at room temperature, wherein the Raman difference is obtained by subtracting the peak position of pure methane measured at 20 ℃ from the position of the Raman difference obtained through the experiment.
The following table is obtained by the series of procedures described above:
TABLE 1 mixture density ρ, peak height ratio HR and frequency shift difference D calculated at a temperature T of 20 deg.C
Example 3
As shown in fig. 1 to 3, on the basis of example 2, by different CH collected at room temperature 4 And C 2 H 6 The Raman spectrum of the content proportion is subjected to peak-splitting fitting by using software peakfit, and CH (transform of temperature and pressure) can be obtained from data 4 And C 2 H 6 The raman characteristic peak shift of the inclusion is regularly changed, and the mixed gas density and the relative content of methane and ethane in the inclusion are deduced based on the known temperature during measurement and the calculated HR after measurement.
The data in table 1 are brought into Matlab software, and the nonlinear surface fitting function in the software is used to select the 3 th power to fit the nonlinear function of rho with respect to HR and D, so as to obtain the following functional relation equation set:
ρ＝a1+a2×HR+a3×D+a4×HR 2 +a5×HR×D+a6×D 2 +a30×HR 3 +a7×HR 2 ×D+a8×HR×D 2 +a9×D 3 #(1)
in the formula:
rho is the mixed gas density of ethane and methane, (g/cm) 3 ) (ii) a HR is the peak height ratio of ethane to methane; d is the frequency shift difference D, cm- 1 ；a1＝0.04124；a2＝-0.0452；a3＝-0.03577；a4＝-6.852；a5＝-0.1853；a6＝-0.0003759；a7＝37.74；a8＝0.3277；a9＝-0.0252；a10＝-0.0005244。
Fitting effect: and (4) SSE:0.0002071; r-square:0.9994; adjusted R-square:0.9992; RMSE:0.002822. proves that the fitting effect is better
And selecting a 3 th power to fit the nonlinear function of x with respect to HR and D, so as to obtain the following functional relation equation set:
x＝b1+b2×D+b3×HR+b4×D 2 +b5×D×HR+b6×HR 2 +b30×D 3 +b7×D 2 ×HR+b8×D×HR 2 +b9×HR 3 #(2)
in the formula:
x is the content ratio of mixed gas ethane and methane, (g/cm) 3 ) (ii) a HR is the peak height ratio of ethane to methane; d is the frequency shift difference D, cm of methane relative to the Raman peak position of pure methane when the pressure or the density tends to 0 value -1 ；b1＝0.0009331；b2＝0.007481；b3＝2.323；b4＝0.004272；b5＝0.3583；b6＝0.3691；b7＝0.0005617；b8＝0.0399；b9＝0.4897；b10＝8.607。
The fitting effect is as follows: SSE:0.000368; r-square:0.9988; adjusted R-square:0.9984; RMSE:0.003762. the fitting effect is proved to be better.
The natural inclusion is placed in a cold and hot table, a Raman instrument is placed to collect a Raman spectrum of the fluid inclusion in a uniform state, a Raman spectrum of mixed gas of ethane and methane in the natural fluid inclusion at room temperature of 20 ℃ is obtained, and corresponding methane and ethane contents, inclusion capture pressure and density rho of mixed gas inside the inclusion can be obtained by obtaining a peak height ratio HR and a peak position V of a methane peak through Labspec software fitting.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A method for accurately acquiring the components and pressure of a methane-ethane mixed gas inclusion through Raman spectroscopy is characterized by comprising the following steps: the method comprises the following steps:
(1) Establishing CH 4 -C 2 H 6 Artificially synthesizing an inclusion Raman quantitative model;
firstly, the method comprises the following steps: preparing a tube and loading a sample;
secondly, the method comprises the following steps: connecting equipment;
thirdly, the steps of: performing Raman observation;
fourthly: washing gas and vacuumizing;
fifth, the method comprises the following steps: collecting a sample spectrum;
(2) Accurate calculation of ethane content in natural methane-rich gas inclusions.
2. The method for accurately acquiring the components and the pressure of the methane-ethane mixed gas inclusion through Raman spectroscopy according to claim 1, wherein the method comprises the following steps: the tubing sample preparation and loading method comprises the following steps: cutting appropriate length of capillary tube, connecting with steel tube with glue, and mixing with known composition CH 4 -C 2 H 6 The mixed gas is filled into a capillary tube by a syringe, and is sealed by mercury, and then a steel tube connected with the capillary tube is connected with a valve.
3. The method for accurately acquiring the components and the pressure of the methane-ethane mixed gas inclusion through Raman spectroscopy according to claim 1, wherein the method comprises the following steps: the equipment connection comprises the following steps: the method comprises the steps of placing a cold and hot table under an objective lens of a transmission microscope, placing a capillary tube into the cold and hot table, adjusting the objective lens to be 10 x, adjusting the height of a Raman microscope to be a proper height, fixing a capillary tube connecting valve on an XYZ three-axis moving platform, adjusting the distance and the height, focusing mixed gas on the inner wall of the capillary tube, connecting a pressure gauge and a pressure pump, adjusting the pressure to be required, keeping the pressure gauge stable for a period of time, closing the valve on one side of the pressure pump, taking down the pressure pump, and displaying the pressure of a sample in real time by a pressure indicator so that the sample can be subjected to Raman observation next.
4. The method for accurately acquiring the components and the pressure of the methane-ethane mixed gas inclusion through Raman spectroscopy according to claim 1, wherein the method comprises the following steps: the Raman observation comprises the following steps: opening software of Raman spectrum, focusing a focus to a gas phase part, opening a cold and hot table and the software thereof, raising the temperature to a specified temperature, keeping the temperature constant, carrying out Raman observation on the mixed gas under a 10 multiplied objective lens, recording Raman and corresponding spectrum of the mixed gas at fixed time intervals, wherein a capillary quartz tube adopted by the experiment has the outer diameter of about 800 micrometers and the inner diameter of about 100 micrometers, and the capillary quartz tube has the advantages of high pressure resistance and is shown in figure 1 as a detailed connection schematic diagram of the experimental device.
5. The method for accurately acquiring the components and the pressure of the methane-ethane mixed gas inclusion through Raman spectroscopy according to claim 1, wherein the method comprises the following steps: the gas washing and vacuumizing steps comprise the following steps: firstly, closing all valves, opening valves V2, V3, V4, V5, V6, V7 and V8, opening a vacuum pump and vacuumizing to discharge air and water in a pipeline, then closing the V3 valve, stopping the vacuum pump, repeating the step for 3-4 times, opening valves V2 and V4, opening a gas cylinder valve, slowly opening the V5 valve, controlling the pressure at 120psi, recording the reading of a pressure gauge, closing the V5 valve, opening the vacuum pump, vacuumizing, and repeating the step for 3-4 times.
6. The method for accurately acquiring the components and the pressure of the methane-ethane mixed gas inclusion through Raman spectroscopy according to claim 1, wherein the method comprises the following steps: the sample spectrum collection comprises the following steps: closing valves V1, V2 and V3, selecting a 20x objective lens for observation, opening a Video window, setting a grating to be 1800cm-1, setting the center of the grating to be 2900cm-1, setting the single acquisition time to be 20 seconds, accumulating 10 times of Raman spectra, observing whether methane-ethane mixed gas is injected successfully or not, if air and other substances are not mixed successfully, repeatedly vacuumizing to ensure that a sample is filled in a quartz capillary tube, closing the valves V1, V2, V3 and V5, inserting the capillary tube into a modified cold and hot platform silver crucible, fixing the capillary tube, covering a cold and hot platform heat insulation cover, controlling the temperature of the experiment, connecting a pressure pump, pressurizing through pure water, synthesizing artificial synthesis inclusion bodies with different contents of ethane, and repeating the steps to obtain corresponding Raman peak heights and peak displacement ratios of methane and ethane under different content ratios, and listing the density, peak height ratio and frequency shift difference value of the methane and ethane mixed gas with different ratios obtained at room temperature, wherein the Raman difference is obtained by subtracting the peak position of pure methane at 20 ℃ from the measured position of the Raman peak of pure methane.
7. The method for accurately acquiring the components and the pressure of the methane-ethane mixed gas inclusion through Raman spectroscopy according to claim 1, wherein the method comprises the following steps: the method for accurately calculating the ethane content in the natural methane-rich gas inclusion is realized by collecting different CH at room temperature 4 And C 2 H 6 The Raman spectrum of the content proportion is subjected to peak-splitting fitting by using software peakfit, and CH (channel) which changes along with temperature and pressure can be obtained from data 4 And C 2 H 6 The raman characteristic peak shift of the inclusion is regularly changed, and the mixed gas density and the relative content of methane and ethane in the inclusion are deduced based on the known temperature during measurement and the calculated HR after measurement.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116879229A (en) * | 2023-07-28 | 2023-10-13 | 湖南五凌电力科技有限公司 | Waveform correlation-based ethane ethylene concentration measuring method and device |
| CN117990641A (en) * | 2024-04-03 | 2024-05-07 | 江苏省特种设备安全监督检验研究院 | Method for synchronously measuring trace gas leakage of natural gas based on mid-infrared absorption spectrum |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116879229A (en) * | 2023-07-28 | 2023-10-13 | 湖南五凌电力科技有限公司 | Waveform correlation-based ethane ethylene concentration measuring method and device |
| CN117990641A (en) * | 2024-04-03 | 2024-05-07 | 江苏省特种设备安全监督检验研究院 | Method for synchronously measuring trace gas leakage of natural gas based on mid-infrared absorption spectrum |
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